remove code dupliction and associated SEGV when reading 0-size RGBA gradients
remove code dupliction and associated SEGV when reading 0-size RGBA gradients

freedesktop-unofficial-mirror/swfdec__swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec